Organic pigments

Organic pigments - colourful variety of bright colours

Synthetic organic pigments are subdivided according to their chemical structure. The most diverse and at the same time largest group are the azo pigments. These pigments account for over 50% of the volume of organic pigments sold. The other group is summarized as polycyclic pigments or, colloquially, non-azo pigments. This group often contains pigments with high fastness properties.

In principle, organic pigments can be distinguished according to their chemical constitution; the Colour Index (C.I.) provides a clear grouping.

The production of organic pigments is carried out by means of sometimes very complex production processes, the explanation of which would go beyond the scope of this article due to the complexity and diversity of the pigments.

Our products in the Organic pigments section

Pigment preparations

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Here are some examples of common organic pigments:

1) Azo pigments: (exemplary)

Monoazo pigments

C.I. Pigment Yellow 74

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‍Disazo pigments

C.I. Pigment Orange 34

C.I. Pigment Yellow 83

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Naphthol / β-naphthol

C.I. Pigment Red 112

C.I. Pigment Orange 5

2) Non-azo or polycyclic pigments

Phthalocyanine

C.I. Pigment Blue 15:1

C.I. Pigment Blue 15:3

C.I. Pigment Green 7

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Chinacridon

C.I. Pigment Red 122

C.I. Pigment Violet 19

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Diketopyrrolo-pyrolle (DPP)

C.I. Pigment Red 254

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Dioxazine (Carbazole Violet)

C.I. Pigment Violet 23

In contrast to inorganic pigments, organic pigments allow achieving significantly higher tinting strength and more brilliant shades. Due to their comparatively very small average particle size, organic pigments tend to require a higher level of dispersion energy and have a lower opacity and therefore appear more transparent.

The fastness properties vary considerably between the different chemical classes and are often significantly worse than those of inorganic pigments. Here, an individual consideration must be made in any case for the selection of suitable pigments. This applies not only to light and weather fastness, but also to solvent and migration resistance, efflorescence behaviour, overpaint fastness, heat resistance etc.